diff --git a/CMakeLists.txt b/CMakeLists.txt index 5007857..c38a26e 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -159,6 +159,7 @@ SET(LIBRARY_HEADERS SDL2pp/Texture.hh SDL2pp/Wav.hh SDL2pp/Window.hh + SDL2pp/Private/EventDispatching.hh SDL2pp/Private/EventHandler.hh SDL2pp/Private/EventHandlerFunctor.hh SDL2pp/Private/EventHandlerObject.hh diff --git a/SDL2pp/EventPolling.hh b/SDL2pp/EventPolling.hh index 24199be..1dd2570 100644 --- a/SDL2pp/EventPolling.hh +++ b/SDL2pp/EventPolling.hh @@ -22,18 +22,19 @@ #ifndef SDL2PP_EVENTPOLLING_HH #define SDL2PP_EVENTPOLLING_HH -#include +#include namespace SDL2pp { namespace Event { template - bool PollEvent(EventHandlers&&...) { + bool PollEvent(EventHandlers&&... eventHandlers) { SDL_Event event; if (!SDL_PollEvent(&event)) { return false; } // TODO: Private::DispatchEvent(event, eventHandlers...); + Private::DispatchEvent(event, eventHandlers...); return true; } diff --git a/SDL2pp/Private/EventDispatching.hh b/SDL2pp/Private/EventDispatching.hh new file mode 100644 index 0000000..6b671a6 --- /dev/null +++ b/SDL2pp/Private/EventDispatching.hh @@ -0,0 +1,70 @@ +/* + libSDL2pp - C++11 bindings/wrapper for SDL2 + Copyright (C) 2017 Vraiment + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ + +#ifndef SDL2PP_PRIVATE_EVENTDISPATCHING_HH +#define SDL2PP_PRIVATE_EVENTDISPATCHING_HH + +#include + +#include + +#include + +namespace SDL2pp { +namespace Private +{ + template + auto DispatchEvent(const SDL_Event &event, EventHandler&& eventHandler) -> std::enable_if::value> + { + eventHandler(event); + } + + template + auto DispatchEvent(const SDL_Event &event, EventHandler&& eventHandler) -> std::enable_if::value> + { + eventHandler.HandleEvent(event); + } + + template + auto DispatchEvent(const SDL_Event&, EventHandler&&) -> std::enable_if::value> + { + static_assert(!IsEventHandler::value, "One of the given values is not a valid event handler"); + } + + template + void DispatchEvent(const SDL_Event & event, EventHandlers&&... eventHandlers) { + DispatchEvent(event, eventHandlers...); + } + + template + void DispatchEvent(const SDL_Event &event, EventHandler&& eventHandler, EventHandlers&&... eventHandlers) { + DispatchEvent(event, eventHandler); + DispatchEvent(event, eventHandlers...); + } + + template <> + void DispatchEvent(const SDL_Event &) { + // no-op + } +} +} + +#endif